Drum winder for paper and the like



1966 D. A. DALY DRUM WINDER FOR PAPER AND THE LIKE 5 Sheets-Sheet 1 Filed Dec. 6, 1963 R o T N E V m Nov. 1, 1966 D. A. DALY 3,282,526

DRUM WINDER FOR PAPER AND THE LIKE Filed Dec. 6, 1965 8 Sheets-Sheet 2 IVENTOR.

A, Dcgly Nov. 1, 1966 D. A. DALY DRUM WINDER FOR PAPER AND THE LIKE 5 Sheets-Sheet 5 Filed Dec. 6, 1963 I N VENTOR. g?

United States Patent 3,282,526 DRUM WINDER FOR PAPER AND THE LIKE David A. Daly, Exton, Pa., assignor to Beloit Eastern Corporation, Downingtown, Pa., a corporation of Pennsylvania Filed Dec. 6, 1963, Ser. No. 328,626 6 Claims. (Cl. 242-66) This invention relates to improvements in drum winders for paper and the like.

In winding large diameter rolls of paper, in which the roll of paper is placed on power driven winding drums and rotatably driven thereby in a winding direction, as the web material is wound about its winder shaft, the wound roll increases in hardness, as the diameter and weight of the roll increases, with a resultant non-uniform density of the rewound roll of paper.

The density of the roll of paper has heretofore been controlled by the use of a rider roll bearing on the top of the roll of paper, and by applying lifting forces to opposite ends of the winder shaft to remove some of the weight of the roll of paper from the nips between the roll of paper and the winding drums.

The winder shafts, however, are quite flexible and deflect considerably under the lifting force with the resultant non-uniform removal of weight from the nip between the roll of paper and the winding drums, in the across-the-machine direction, and many times the winder shafts are not strong enough to allow sufficient relieving force to be applied to them to properly control the roll density.

In carrying out the present invention, I relieve the nip pressures between the roll and the winding drums by applying a lifting force to the opposite ends of the winder shaft and by subjecting the winder shaft to an oppositely directed cantilever bending action.

This cantilever bending action counteracts the deflection of the winder shaft, which under the lifting forces assumes a U-shaped deflection and exerts a counteraction on the winder shaft, to assume an S-shaped deflection curve and more nearly approach a straight line, and thereby more uniformly relieve the weight from the roll of paper and effect a uniform density of the roll.

The S-shaped deflection more nearly approaches a straight line giving a more uniform relieving of weight from the roll of paper and the journals for the winder shaft and those portions of the shaft between the face or side of the roll, and the journal supports for the bearing boxes are stressed less by this counterbending than by a simple relieving action by lifting on opposite ends of the shaft, because of the reversal of bending and the area between the face of the roll and the journal supports, with the resultant lower stresses in the journal supports, making it possible to increase the load relieving action over what could practically be attained by simply lifting on opposite ends of the winder shaft.

In the form of the invention herein disclosed, bending forces are applied to the bearing boxes for the winder shaft and the bending force is so applied that the direct force and the reaction tothis force is contained in the bearing box and slide. The slide is also moved vertically along its guide by a chain or like flexible device and by applying the bending force to the bearing box so that its line of action is behind the centerline of the chain, the moment created on the slide gibs by the lifting or relieving force, is counteracted by the moment created by the bending, with the result that the slide gibs are comparatively free of additional forces over those encountered during normal operation, and the system has less loss of force with a resultant greater relieving ability.

Moreover the relieving of weight from the roll as it builds up, and the pressure of bending also increases as it builds up as a straight line function of diameter so the relieving forces on opposite ends of the winder shaft are equal to the total relieving force output minus the bending forces, and where the system is operated by fluid under pressure, it may be operated by the same valve supplying fluid under pressure to both the bending and relieving cylinders, or the ratio of the pressures may be changed to adjust the amount of bending consistent with the amount of relieving.

A principal object of the present invention, therefore, is to overcome the deficiencies heretofore present in drum type winders and to effect the winding of a roll of uniform density by providing relieving forces at opposite ends of the winder shaft for the roll, and by offsetting the deflection of the shaft caused by these relieving forces and subjecting the winder shaft to bending actions about its ends.

Another object of the invention is to relieve the weight and redure the deflection of a winder shaft of a drum winder, by deflecting opposite ends of the shaft upwardly and by providing a turning movement to the bearing boxes, supporting opposite end portions of the shaft.

Another object of the invention is to improve upon the drum winders heretofore in use for winding large diameter rolls of paper having a winder shaft extending through the roll of paper, by relieving the weight of the roll of paper on its supporting winding drums by lifting opposite ends of the winder shaft and by placing a bending action on the shaft in a direction contrary to the lifting action on opposite ends of the shaft.

A still further object of the invention is to provide an improved system for controlling the load supported by a pair of winder drums of a drum web winder, while the roll is continuously building up on the winder shaft, which comprises fluid pressure operated devices exerting a lifting action on opposite ends of the shaft and other fluid pressure devices exerting a contrary bending action on opposite ends of the shaft, in which the lifting and bending forces progressively increase upon building up of the roll.

A still further object of the invention is to provide an improved form of winder having a pair of winder drums supporting a web roll, continuously building up on a winder shaft, in which pressure is maintained on the web by a rider r-oll engaging the web with decreasing pressure as the weight of the wound roll of paper increases, by lifting opposite ends of the shaft by fluid pressure cylinders and pistons, in which the forces of lifting are counteracted by other fluid pressure cylinders and pistons exerting bending actions on opposite ends of the shaft contra to the deflection action exerted on the shaft by the lifting cylinders and pistons.

These and other objects of the invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawings where- 1n:

FIGURE 1 is a view in side elevation of a drum winder constructed in accordance with the principles of the present invention, with the winder drums shown in phantom and with certain parts broken away, and showing the bearing clamp for the winder shaft in a lowermost position;

FIGURE 2 is a front elevational view of the winder shown in FIGURE 1 with certain parts broken away and certain other parts removed;

FIGURE 3 is a fragmentary view in side elevation of the winder, showing the roll built up on the winder drums; and

FIGURE 4 is a diagrammatic view illustrating the principles of the invention.

In the embodiment of the invention illustrated in the drawings, I have shown a drum winder including a pair of side frame members 11, 11 having posts 12, 12 extending upwardly from the rear end portion thereof. The side frame members 11, 11 carry bearing supports for rotatably mounting a pair of spaced horizontally aligned winder drums 13, 13, coacting to define a winding nip therebetween. The posts 12, 12 have vertical gibbed guide tracks 15, 15 (FIGURE 2) for slides 16, 16 each having a split bearing clamp 17 at the lower end thereof and projecting forwardly to position its axis into vertical alignment with the winder nip between the winder drums 13, 13.

As shown in FIGURE 1, the bearing clamp 17 is pivotally mounted on a pivot pin 18 on the lower end of a bar 19 extending along the slide 16 and beneath the bottom thereof and has an arm 2% extending forwardly therefrom having half of the bearing clamp 17 formed integrally therewith and having a cap 21 clamped thereto as by a conventional clamping member 23, to clamp a bearing box 24 thereto. The bearing boxes 24 form bearings for opposite ends of a Winder shaft 25. The winder shaft 25 may be of a conventional form and may be surrounded by a tubular shell 26 on which the web is wound.

The leading end of the paper web W is threaded around the tubular shell 26 and suitably clamped thereto. The r-olls 13, 13 are then driven to rotate the winder shaft and shell so that a roll of paper will build up on said shell in contact with the winder drums 13, 13. As the roll builds up on the shell 26 and winder shaft 25, the winder shaft 25 will ride on the nip between the winder drums 13, 13, lifting the bearing clamps 17, 17 and the slides 16 along the guides 15.

A means is provided to lift the slide 16 along the guides 15 and relieve the weight of the paper built up on said winder shaft from the winder drums 13, 13 which is herein shown as being a chain 27 suitably secured to the slide 16 adjacent the upper end thereof and extending upwardly along the center line between the guides 15, to and around a sprocket 29 mounted on a transverse shaft 30. The chain 27 is trained angularly upwardly and rearwardly to the sprocket 29 to a direction changing sprocket 31 and partially around said sprocket and downwardly and angularly forwardly about an idler sprocket 32. From thence the chain extends downwardly to a counterweight 33. A length of chain 35 extends downwardly of the counterweight 33 to and around a direction changing sprocket 36 and is suitably secured at its lower end to the slide 16. The sprocket 29 is turned manually to raise or lower the slide 16 and winder shaft 25 by means of a hand wheel 37 and a chain and sprocket 39 rotatably driving the shaft 30 and the sprocket 29 thereon.

The chain 27 and the length of chain 35 are driven by power to positively lift the slide 16 at opposite ends of the winder shaft 25 by a fluid pressure cylinder 40 having a piston rod 41 extending from opposite sides of a piston (not shown) in the cylinder and through opposite ends of the cylinder. The piston rod 41 has a connector 42 at its upper end having a chain 43 connected thereto and trained about a sprocket 44. The chain is trained downwardly of the sprocket 44 to a connector 45. The connector 45 has a chain 46 connected to its lower end and depending therefrom and trained about a sprocket 47 on an idler shaft 48, mounted in bearing support brackets 49 projecting rearwardly of the post 12. The length of chain 46 extends upwardly of the sprocket 47 to a connector 50 on the lower end of the piston rod 41, and is suitably connected thereto. Thus, as fluid under pressure, such as air, is admitted to the upper end of the cylinder 40, the connector 42 will move in a downward direction and drive the sprockets 44 and 31 in counterclockwise directions. This will effect upward lifting movement of the respective slide 16 and the split bearing clamp 17 and winder shaft 25 carried thereby. The slide 16 on the opposite post 12 is raised and lowered in a similar manner at the same rate of speed as the slide just described, so the same part numbers will be applied to the same operative parts therefor and the description for the opposite side of the winder need not be repeated herein.

A rider roll 53 is carried in spaced carriages 54 slidably guided in gibbed guides (not shown) extending vertically along the front faces of the posts 12, for riding on top of the roll to maintain a predetermined pressure nip between the roll of paper and the winder drums and to exert a predetermined force on the roll of paper as it is being wound, which decreases as the roll of paper builds up on the winder shaft and is released as the roll of paper is built up to a predetermined diameter. The rider roll 53 may be of a conventional form and the carriage 54 and rider roll 53 are moved upwardly along the posts 12 by an endless chain 56 connected at its lower end to an I-bolt 57, secured to and extending upwardly of the carriage 54. The endless chain 56 turns about a direction changing idler 57a freely journalled on a beam 58 connecting the post 12 with a rearwardly spaced post 59. The chain 57 extends along the beam 58 and about and downwardly of a sprocket 6t), freely mounted on said beam, and downwardly from said sprocket to a piston rod 61, to which it is connected. The piston rod 61 is extensible from a vertical cylinder 62 when the rider roll 53 is in its lowermost position and is retractible within said cylinder upon the admission of fluid under pressure, such as air, to the head end thereof, to raise said rider roll along the post 12 in a conventional manner.

The rider roll 53 may be counterweighted and may be removed from the paper roll when the weight of the roll is such as to give adequate nip pressure, as is conventional with drum winders.

It may be seen from the foregoing that the rider roll 53 provides the required nip pressure for initially winding paper on the winder shaft 25 and that as paper builds up on the core 26, the cylinders 40 lift the slides 16 through the chains 27, and apply a relieving force on the winder shaft and subject the shaft to a cantilever bending between the faces of the roll and the bearing boxes 24. This also deflects the shaft between the face of the roll and the center line of the machine and imparts a generally U-shaped deflection of the shaft.

A means is provided to apply a bending moment to each bearing box 24 supporting the winder shaft 25 in a direction opposite to the bending moment applied to the shaft by lifting of the opposite ends thereof, to cause the shaft to assume a generally S-shaped deflection curve approaching a straight line and therefore give a more uniform relieving of the weight of the roll of paper from the winder drums 13, 13. This means comprises a vertical bending cylinder 65 mounted on the outside of each post 12 and having a depending piston rod 66 having a cap or abutment 67 on the lower end thereof. The abutment 67 is in direct vertical alignment with a button 69 proecting upwardly of an arm 70 extending outwardly along the front end of the post 12 and rearwardly along the side of said post to clear said post as the slide 16 is moved vertically along the guides 15.

As the roll builds up on the core 26 and winder shaft 25, and the chains 27 lift the slides 16 and winder shaft upwardly along the post 12 and the guides 15, the abutments or caps 67 on the ends of the piston rods 68 will come into engagement with the buttons 69. The pressure of fluid, such as air in the cylinders 65 will tend to move the arms 70 and bearing boxes 24 about the axis of the pivot pin 18 in a direction, which in FIGURE 1 is a counterclockwise direction in contrast to the clockwise force exerted on the bearing box 24 and winder shaft 25, effected by lifting of said-bearing box and shaft.

The bending force is thus applied to the bearing box and the direct force and the reaction to this force is con tained in the bearing box and slide. The shaft being journalled in the bearing box and the bearing box being clamped by the split bearing clamp 17, will only feel the couple or moment of bending, and the bending force is applied to the bearing box so that its line of action is behind the center line of the chain 27, supporting the slide. The moment created on the slide gibs by the relieving of the weight of the roll is thus counteracted by the moment created by the bending, allowing the slide gibs to freely move along the guides 15.

The relieving of weight from the roll, building up on the Winder drums 13, 13 is progressive, with the relieving pressure increasing as the roll builds up. The pressure in the bending cylinder 65 is also progressive and the relieving pressure must increase as the rolls build up in pressure. In order to attain this, the pressure in the relieving cylinders and bending cylinders is controlled by a cam operated air valve or pressure regulator, which senses the roll diameter and increases the pressure to the relieving cylinders 40 and the bending cylinders 65 as a straight line function of diameter depending on the shape of the cam of the cam operated air valve or pressure regulator.

It is, of course, obvious that the cylinder that produces the relieving also produces the reaction to the bending cylinder forces, so that the bending force does not add to the nip and the relieving cylinders produce relieving forces equal to the total force out-put of the relieving cylinders minus the bending cylinder force.

As shown in FIGURES l and 2, a cam 71 is keyed or otherwise secured to a shaft 73, suit-ably journalled in the post 12 and extending outwardly therefrom. The cam is driven from the shaft 30 by a chain and sprocket drive 74. The cam 71 has operative engagement with a fo1- lower 75, for operating a regulator 76. The regulator 76 controls the supply of pressure to the cylinders 40, 40 and 65, 65 and supplies the cylinders 40, 40 with increasing pressures as the roll builds up with paper, to relieve the entire weight of the paper build up from the winder drums 13, 13 and also regulates the pressure in the cylinders 65, 65 'to substantially the pressure in the relieving cylinders 40, 46, to bend the bearing boxes 24 in directions which in FIGURES 1 and 2 are counterclockwise directions, and thereby minimize shaft deflection by progressively increasing the counterbending for roll diameters from zero pressures at 32 inches in diameter to the maximum bending action the shaft can safely take as the roll builds up in diameter. Suitable control lines and valves may be provided from the pressure regulator 76 to the cylinders 40, 40 and 65, 65 which may be so arranged that all of the cylinders 40, 40 and 65, 65 will exhaust simultaneously.

It should also be understood that while the system is operated by the same air pressure going to both the bending cylinders 65, 65 and the relieving cylinders 40, 40 that the ratio of pressures in the two sets of cylinders may be changed using conventional ratio totalizers to enable the amount of bending to be adjusted consistent with the amount of relieving.

A cam 77 on the shaft 30 engages a follower 79 of a regulator 80, regulating the pressures in the rider roll cylinders 62, and progressively increasing the pressures therein to relieve the roll of paper from the weight of the rider roll 53 as the paper builds up in diameter.

While I have herein shown and described one form in which the invention may be embodied, it may readily be understood that various modifications and variations in the invention may be attained without departing from the spirit and scope of the novel concepts thereof.

I claim as my invention:

1. In a drum winder for winding webs of paper and the like into rolls, a horizontal winder shaft, a pair of winder drums on opposite sides of said shaft and adapted to support and wind a web about said shaft into the form of a roll, rectilinear guide means for opposite ends of said shaft, accommodating movement of said shaft upwardly as the roll of paper increases in diameter, fluid pressure reacting means at each end of said shaft and exerting upward lifting forces on opposite ends of said shaft during winding of the roll, other fluid pressure reacting means at each end of said shaft and exerting opposite cantilever bending forces on opposite ends of said shaft, and pressure regulator means operable in accordance with the diameter of the roll of paper, for maintaining fluid under pressure in each of said fluid pressure means at opposite ends of the shaft at progressively increasing pressures as the diameter of the roll increases.

2. In a drum winder for Winding webs of paper and the like into rolls, a frame structure including a pair of parallel spaced posts having a pair of parallel winder drums mounted therebetween, each post having a guide extending vertically therealong having a slide slidably guided therein, a bearing clamp supported on each slide for pivotal movement about an axis extending transversely of the axes of the winder drums, a winder shaft adapted to have a web of paper rolled thereon to form a roll, lbearing boxes for opposite ends of said winder shaft and clamped in said bearing clamps, fluid pressure cylinders in association with said guides and having operative connection with the associated slides for exerting upward lifting forces thereon as the diameter of the roll of paper increases, and bending cylinders mounted on said posts in association with said bearing clamps and bearing boxes and spaced laterally from the axis of said shaft, and exerting downward cantilever bending pressures thereon upon upward lifting movement of said bearing boxes.

3. In a drum winder for winding webs of paper and the like into rolls, a frame structure including a pair of parallel spaced posts having a pair of parallel winder drums mounted therebetween, each post having a guide extending vertically therealong having a slide slidably guided therein, a bearing clamp supported on each slide for pivotal movement about an axis extending transversely of the axes of the winder drums, a winder shaft adapted to have a web of paper rolled thereon to form a roll, bearing boxes for opposite ends of said winder shaft and clamped in said bearing clamps, fluid pressure cylinders in association with said guides and having operative connection with the associated slides for exerting upward lifting forces thereon as the diameter of the roll of paper increases, bending cylinders mounted on said posts in association with said bearing clamps and bearing boxes, and exerting downward bending pressures thereon upon upward lifting movement of said bearing boxes, and a pressure regulator having fluid connection with each of said fluid pressure cylinders, for regulating the pressure therein to progressively increase as the diameter of the roll increases.

4. In a drum winder for winding webs of paper and the like into rolls, a frame structure including a pair of parallel spaced posts having a pair of parallel winder drums mounted therebetween, each post having a guide extending vertically therealong having a slide slidably guided therein, a bearing clamp supported on each slide for pivotal movement about an axis extending transversely of the axes of the winder drums, a winder shaft adapted to have a Web of paper rolled thereon to form a roll, bearing boxes for opposite ends of said Winder shaft and clamped in said bearing clamps, fluid pressure cylinders in association with said guides and having operative connection with the associated slides for exerting upward lifting forces thereon as the diameter of the roll of paper increases, bending cylinders mounted on said posts in association with said bearing clamps and bearing boxes, and exerting downward bending pressures thereon upon upward lifting movement of said bearing boxes, a cam rotatably driven in accordance with increases in diameter of the roll and sensing roll diameter, and a pressure regulator operated by said cam and increasing the pressure to said cylinders as the diameter of the roll increases.

5. In a drum winder for winding webs of paper and the like, into rolls, a frame structure including a pair of parallel spaced posts having a pair of parallel winder drums mounted therebetween, each post having guide means extending vertically therealong, a slide slidably movable along each guide means, a rider roll mounted on said slides for engagement with the top of the roll of paper, a fluid pressure cylinder lifting said rider roll to progressively decrease the force of engagement of said rider roll with the roll of paper as the dimaeter of the roll of paper increases, other slides slidably guided in said guide means, and each having a bearing clamp supported thereon, a winder shaft adapted to have a web of paper rolled thereon by said winder drums to form a roll, bearing boxes for said shaft and clamped in said bearing clamps, a fluid pressure cylinder in association with each of said other slides, operative connections between said cylinders and said other slides for exerting upward lifting forces thereon, and a bending fluid pressure cylinder in association with each of said other slides and bearing boxes and spaced laterally from the axis of said shaft, and exerting downward cantilever bending forces on said bearing boxes and shaft upon upward lifting movement of said slides.

6. In a drum winder for winding webs of paper and the like, into rolls, a frame structure including a pair of parallel'spaced posts having a pair of parallel winder drums mounted therebetween, each post having guide means extending vertically therealong, a rider roll extending across said post and slidably guided in said guide means, said rider roll engaging the top of the roll of paper and determining a predetermined nip pressure between the roll of paper and said winder drums, fluid pressure cylinders and flexible draft devices operated thereby having operative connection with opposite ends of said rider rolls for lifting said rider roll to relieve the pressure of said rider roll on the roll of paper as the diameter of the roll of paper increases, a slide slidably guided in said guide means and having a bearing clamp supported thereon, a winder shift adapted to have a web of paper rolled thereon into the form of a roll, bearing boxes for said shaft, said bearing boxes being clamped in said hearing clamps, a fluid pressure cylinder in association with each guide, and a separate flexible draft device operatively connecting each cylinder with an associated slide, for lifting said slide, a shaft driven by one of said flexible draft devices in accordance with upward lifting movement of said slide and winder shaft, a bending fluid pressure cylinder and piston in association with each guide and bearing box and operable to exert -a downward bending pressure on the associated bearing box upon upward lifting movement thereof, a pair of cams driven by said shaft, each sensing the diameter of the roll wound on said winder shaft, a pressure regulator operable by one of said cams in accordance with increases in roll diameter and regulating the pressure in said first cylinder for lifting said rider roll to engage the roll of paper with progressively decreasing pressures, as the roll of paper increases in diameter, and a second pressure regulator operated by said second cam and regulating the pressures in said other cylinders and pistons to progressively increase the lifting force on said winder shaft and progressively increase the conterbending action on said winder shaft as the diameter of the roll increases.

References (Iited by the Examiner UNITED STATES PATENTS 3,079,101 2/1963 Rockstrom 24263 STANLEY N. GILREATH, Primary Examiner.

MERVIN STEIN, Examiner. L. D. CHRISTIAN, Assistant Examiner. 

1. IN A DRUM WINDER FOR WINDING WEBS OF PAPER AND THE LIKE INTO ROLLS, A HORIZONTAL WINDER SHAFT, A PAIR OF WINDER DRUMS ON OPPOSITE SIDES OF SAID SHAFT AND ADAPTED TO SUPPORT AND WIND A WEB ABOUT SAID SHAFT INTO THE FORM OF A ROLL, RECTILINEAR GUIDE MEANS FOR OPPOSITE ENDS OF SAID SHAFT, ACCOMMODATING MOVEMENT OF SAID SHAFT UPWARDLY AS THE ROLL OF PAPER INCREASES IN DIAMETER, FLUID PRESSURE REACTING MEANS AT EACH END OF SAID SHAFT AND EXERTING UPWARD LIFTING FORCES ON OPPOSITE ENDS OF SAID SHAFT DURING WINDING OF THE ROLL, OTHER FLUID PRESSURE REACTING MEANS AT EACH END OF SAID SHAFT AND EXERTING OPPOSITE CANTILEVER BENDING FORCES ON OPPOSITE ENDS OF SAID SHAFT, AND PRESSURE REGULATOR MEANS OPERABLE IN ACCORDANCE WITH THE DIAMETER OF THE ROLL OF PAPER, FOR MAINTAINING FLUID UNDER PRESSURE IN EACH OF SAID FLUID PRESSURE MEANS AT OPPOSITE END OF THE SHAFT AT PROGRESSIVELY INCREASING PRESSURES AS THE DIAMETER OF THE ROLL INCREASES. 